`settingsPid` handles only single PID (and `settingsPidRecursionLevel`is ignored)

[julianhofmann]

Setting a single PID as storage for the settings works. Setting multiple PIDs or specifying a recursion level does not work.

Reason

FilterService::buildObjectFilteris using $this->settings['settingsPid'] directly instead of going via ExtensionSettings::getConfiguredStoragePids(). As a result, the specified PID (or list of PIDs) is passed into QuerySettings as a single element in the array. This causes everything after the first comma in the list to be omitted.
settingsPidRecursionLevel is completely ignored by the FilterService.

Possible solution

Passing ExtensionSettings::getConfiguredStoragePids()to the QuerySettings.